well...cheat engine = user's visual change.
if you have a equip to repair that cost 100g and you have 50g, when you use cheat engine to have 999999g, you still wont be able to repair.
when you have 300atk and change it to 99999, you will stay hitting 300.
when you have 2000hp and you change it to 9999, you will die after lose 2000hp.
when you have 2500defense and you change it to 9999, mob will hit same on you.
when you have 500g and want buy a shop item for 700 and change your gold to 99999, you won't be able to buy.
when you have 150 mana and change it to 9999, when the 150 end, you won't be able to use skills.